Correctly get unbound function '__new__' for native wrapper.

Author: fangerer

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/cext/PythonObjectNativeWrapperMR.java

@@ -69,6 +69,7 @@
 import com.oracle.graal.python.nodes.SpecialAttributeNames;
 import com.oracle.graal.python.nodes.SpecialMethodNames;
 import com.oracle.graal.python.nodes.attributes.GetAttributeNode;
+import com.oracle.graal.python.nodes.attributes.LookupAttributeInMRONode;
 import com.oracle.graal.python.nodes.attributes.LookupInheritedAttributeNode;
 import com.oracle.graal.python.nodes.call.special.LookupAndCallUnaryNode;
 import com.oracle.graal.python.nodes.object.GetClassNode;
@@ -220,7 +221,7 @@ Object doTpAsBuffer(PythonClass object, @SuppressWarnings("unused") String key)
 
         @Specialization(guards = "eq(TP_NEW, key)")
         Object doTpNew(PythonClass object, @SuppressWarnings("unused") String key,
-                        @Cached("create()") GetAttributeNode getAttrNode) {
+                        @Cached("create()") LookupAttributeInMRONode getAttrNode) {
             return ManagedMethodWrappers.createKeywords(getAttrNode.execute(object, SpecialAttributeNames.__NEW__));
         }